Merge branch 'ubuntu-lts'

qalculator.cpp

@@ -23,7 +23,10 @@ Output_struct qalculate(const char* input, bool exact_mode, bool interval_mode,
     // Check evaluation options
     user_evaluation_options.structuring = (structuring_mode ?
         STRUCTURING_FACTORIZE :
-        STRUCTURING_SIMPLIFY);
+        STRUCTURING_EXPAND);
+    user_evaluation_options.interval_calculation = (interval_mode ?
+        INTERVAL_CALCULATION_VARIANCE_FORMULA :
+        INTERVAL_CALCULATION_NONE);
     user_evaluation_options.approximation = (exact_mode ? 
         APPROXIMATION_EXACT :
         APPROXIMATION_APPROXIMATE);